不同土地利用方式和种植年限对土壤交换性酸的影响

Effect of Different Land Utilization Patterns and Planting Years on Exchangeable Acidity in Soils

为了解热带地区土壤肥力及防止土壤酸化,以海南屯昌县为例,对不同土地利用方式(次生林、橡胶林、甘蔗地和水稻田)和种植年限(甘蔗35年、45年和55年;橡胶15年、25年和35年)的土壤交换性酸进行了测定与分析,结果表明:不同利用方式对土壤交换性铝含量的影响显著,其含量大小为次生林地>橡胶林地>甘蔗地>水稻田,对土壤交换性氢含量的影响不显著;不同种植年限甘蔗地土壤交换性氢含量大小为35年>45年>55年,交换性铝的含量呈无规律性变化;不同种植年限对橡胶林土壤交换性铝含量的影响显著,其含量大小为15年>25年>35年,对交换性氢含量的影响不显著。

The exchangeable acidity in soils under different land utilization patterns（secondary forest,rubber forest,sugarcane land and rice paddy field） and planting years（planting sugarcane for 35,45 and 55 years,and planting rubber for 15,25 and 35 years） was determined and analyzed to study soil fertility and soil acidification in the tropical zone in Tunchang county,Hainan province.The results showed that the different soil utilization patterns had significant effect on soil exchangeable aluminum content and the soil exchange able aluminum content was secondary forest〉rubber forest〉sugarcane land〉rice paddy field,the different soil utilization patterns had no significant effect on soil exchangeable aluminum content,the soil exchangeable hydrogen content of the sugarcane land with different planting years was 35 years45 years〉55 years,the different planting years had significant effect on soil exchangeable aluminum content of rubber forest and its content was 15 years 〉25 years〉35 years.